Internal-combustion engine



I. M. EISLER.

INTERNAL COMBUSTION ENGINE. I APPLICATION FILED MN. 5. I920. 1,371,550 Patented Mar. 15,1921,

2 SHEEIS-SI1EEI &

J. M. EISLER. INTERNAL COMBUSTION ENGINE.

APPLlCATION FILED LAN. 5, 1920.

Pammm Mm: H5, 192% 2 $HEETSSHEET 2- [1/ [I Ill/l ll/ i To allfwhom it may concern:

res TENT OFFIC aosnrn z sfmsmas, or person, MICHIGAN.

mrsmmncoiunusriou ENGiNE.

Be it known that I, Josnrn M. Exams a citizen of the United States, 'residi at lietroit, county of Wayne, State of ichi an, have invented a certain new and useful mprovenient in Internal-Combustion Engines,

and declare the following ti: be a. fulhcllcar, t e same, suc-i as and exact description will enable others skilled in the art to which it pertains to make and use the same, reference being had to the, accompanying drawin which form a part of this specification.

y invention relate'sto improvements. in internal combustion engines, and particularly to that type in which each end of the cylinder is utilizedas an explosion chamher; in improved means of valve operation for such a type of construction; and in imcylinder.

proved means for lubricating the'piston- In the drawings- Figure 1 is an elevation, partly in1sec-. tion of a. four cylinder type of motor built in. accordance with my improveddesign.

Fig. 2 is a vertical cross section showing the inlet valve open at the bottom of the Fig. 3 is a vertical close section showing the inlet valve open at the top of the cy l-- inder. 1

Let (1., represent the enginecasin'g, b, the driven crank shaft, c, a pitman rodcarried hy one of it-s'cranlts, which pitman rod piv- 7 otully carries a. cross head d,-m0vable within guides e-e' parallel to. the bore of the cylinder ,r.- A piston g,'-'is carried from cross head d, by means of a piston red It. Cylinder f, is provided in the usual Yuan-1 nor with coating chambersfi-and i located in the wells thereof. 1 At each end of the cylinder are valve casi ingwith the interior thereof in manner shown, so as to. provide inlet and exhaust valves j, adapted i e-seat in said casing, each held in place, of a helical -valve spring ic 'which encircles the valve stem m.

The vertical'niovement of each valve stem is directed bymeen's of a ide m, as shown.

I In Fig. '1 of the drawing the casing is cut away to show method of piston lubrication and valve actuation, and exhaustand. intake" j manifoldsfa're indicated at p and p respec- 23-4 communicate the' oil conduit Specification of Letters Patent. I Patented Di 15 1921; Application filed January 5, 1920.; serial No. 349,331."

at end, and is hollowed out as shown" for .pur'poses of lubrication. Lubricant is supp' the interim-Softhis piston g bv means of 0 11 pipe which enters through the piston rod his oil conduit after it has extended longitudinally of the piston rod su'fiiciently to pennit' the full upward stroke of the piston, is bent in form of a U with parallel. arms. 'The army, which is complementa through the piston rod, is nda an 011 operation of the piston, which oil passa eway Jr, is supplied witlr lubricant in t e usual-manner from the oil pump which su plies the remainder of the system. As t 0 oil is forced from the pump, it will be passed through the tube r, and the .U. i into the interior of the piston. It will E:

observed that the arm 9 ofthe U tube passes longitudinallyv through--- the piston rod through a somewhat larger longitudinal passageway '1), which extends the entire length of the rod, so, thatthe oil which en-' ters through such tube 9, and does not drain outfrom the flange 8, through the exits a to the arm g, which fosms.

pted for reciprocatory movement within passageway r, coincident with the may drain back throi h such passageway 'v,

along'the exterior-wail of the tube 9, into the engine;

Acheck valve w, is provided so that the oil, will fiow-but'one "way through such U tube. This is of conventional structure.

Due to the reciprocatory movement of the piston as theoil emerges from the end'of the tube q, it. is thrown the upper 'W8.ll of the piston and is splashed back into the circumferential flange s, which encircles .the interior of: the piston, and drains out through the lubricant. exits a so as to lubripassageways' thereto, and provided. withcatetheiston' new. .i'

It will observed that hut one cam shaft I or, is provided with eccentric cams n and-n located,- side. 'by side thereon, so positioned that valves will lie-actuated 'mproper firing order y meansoiesuchams operating "the valve tappets mfiwhich'in turn actuate theyalve stems m, Inlet and exhaust valves are ofi'set as sh'ofgv'vn "so as to permit this method of cum arigangement and valve operation. The usual valve spring k, is in i twh instance provided for seating the valve.

-1.-, In an internal "combustion engine a cylinder, a hollow piston-adapted to recipprovided with two sets of piston rings, -one rocate in said cylinder, bilducts leading which extendsl piston rod discharging into the interior of through the outer wall said eylinder, a

U shaped lubricant,- conduit one arm of sageway of theoiling system.

2. In an internal combustion engine, a

cylinden'a hollow piston adapted to reciprocate therein, a hollow pistpn rod, a U shaped lubricant conduit one arm of which passes thronghthe interior of the hollow piston rod spaced from the wall of thereof so as to leavean annular passageway between the conduit and the wall of the passageway through the piston-rod adapted to permit oil to drain from the interior of the hollow piston through the piston rod, the other arm of such U shaped conduit sleeved'for reciprocatory' movement within an oil passage-1 i the piston during the operation thereof.

- way of the oiling system,

3. In an internal combustion engine, a.

cylinder, a hollow piston adapted to reciprocate therein, such piston provided with a hollow piston rod adapted to permit the flow ongitudinally through the for of lubricant therethrough from the interior a of the piston, a separate oil conduit extending throu 'h the interior of said piston rod but spacedfrom the wall thereof so as to leave an oil passageway exterior the conduit,

means for supplying oil through such conduit to the interior of the piston.

4. In an internal combustion engine, a cylinder, a hollow piston adapted to reciprocate therein,'such piston provided with a hollow "piston rod, a separate oil conduit extending through the interior of the said piston rod but spaced therefrom so as to 1'0- vide a lubricant passageway exten ing throu h sugh piston'r'od along the exterior of sai inner conduit, such piston provided with an internally projecting flange, the end of said conduit which extends through the hollow piston rod extending sufficiently into the interior of the piston so that oil' passing thetethrough is throwri'against the head of "In testimony whereof, I sign this-specification. g

JOSEPH- M, ElSLER. 

